Atomic charges, dipole moments, and Fukui functions using the Hirshfeld partitioning of the electron density

被引:239
作者
De Proft, F
Van Alsenoy, C
Peeters, A
Langenaeker, W
Geerlings, P
机构
[1] Free Univ Brussels, VUB, Eenheid Algemene Chem, ALGC,Fac Wetenschappen, B-1050 Brussels, Belgium
[2] Univ Antwerp, UIA, Dept Chem, B-2610 Antwerp, Belgium
[3] Janssen Res Fdn, Dept Mol Design & Chemoinformat, B-2340 Beerse, Belgium
关键词
Hirshfeld partitioning; Hirshfeld charges; atomic dipole moments; Fukui functions; atoms in molecules;
D O I
10.1002/jcc.10067
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In the Hirshfeld partitioning of the electron density. the Molecular electron density is decomposed in atomic contributions, proportional to the weight of the isolated atom density in the promolecule density. constructed by superimposing the isolated atom electron densities placed on the positions the atoms have in the molecule, A maximal conservation of the information of the isolated atoms in the atoms-in-molecule, is thereby secured, Atomic charges, atomic dipole moments, and Fukui functions resulting from the Hirshfeld partitioning, of the electron densitiy are computed for a large series of molecules. In a representative set of organic and hypervalent molecules. they are compared with other commonly used population analysis methods. The expected bond polarities are recovered, but the charges are much smaller compared to other methods. Condensed Fukui function,, for it large number of molecules, undergoing an electrophilic or a nucleophilic attack. are computed and compared with the HOMO and LUMO densities, integrated over the Hirshfeld atoms in molecules.
引用
收藏
页码:1198 / 1209
页数:12
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